28025275279517 has 2 divisors, whose sum is σ = 28025275279518. Its totient is φ = 28025275279516.

The previous prime is 28025275279511. The next prime is 28025275279531. The reversal of 28025275279517 is 71597257252082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26370833644516 + 1654441635001 = 5135254^2 + 1286251^2 .

It is a cyclic number.

It is not a de Polignac number, because 28025275279517 - 2⁴ = 28025275279501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28025275279517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28025275279511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14012637639758 + 14012637639759.

It is an arithmetic number, because the mean of its divisors is an integer number (14012637639759).

Almost surely, 2^{28025275279517} is an apocalyptic number.

It is an amenable number.

28025275279517 is a deficient number, since it is larger than the sum of its proper divisors (1).

28025275279517 is an equidigital number, since it uses as much as digits as its factorization.

28025275279517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392000, while the sum is 62.

The spelling of 28025275279517 in words is "twenty-eight trillion, twenty-five billion, two hundred seventy-five million, two hundred seventy-nine thousand, five hundred seventeen".